feat: Begins vapor application, begins view controller.

Sources/ViewController/Views/MainPage.swift

@@ -0,0 +1,25 @@
+import Elementary
+
+public struct MainPage<Inner: HTML>: SendableHTMLDocument where Inner: Sendable {
+  public var title: String { "Manual-D" }
+  public var lang: String { "en" }
+  let inner: Inner
+
+  init(_ inner: () -> Inner) {
+    self.inner = inner()
+  }
+
+  public var head: some HTML {
+    meta(.charset(.utf8))
+    script(.src("https://unpkg.com/htmx.org@2.0.8")) {}
+    script(.src("/js/main.js")) {}
+    link(.rel(.stylesheet), .href("/css/main.css"))
+    link(.rel(.icon), .href("/images/favicon.ico"), .custom(name: "type", value: "image/x-icon"))
+  }
+
+  public var body: some HTML {
+    inner
+  }
+}
+
+public protocol SendableHTMLDocument: HTMLDocument, Sendable {}